>From the album Led Zeppelin IV
Tabbed by Alex Straus (NCCowdew@aol.com)

1.Main Verse
(The part when music play after Robert Plant sings)

G-------------------5-----7----9-----5h7-------5--------------------------
D--------5-6-7-------7---------------------7-7----7--5--7--7------------
A------7--------7--------------------------------------------------5--7--3--5--0-
E-----------------------------------------------------------------------------

2. Play this I believe 3 times and then play it again but go down

G-------------------------
D-----------------5------
A-------5--6--7---------
E-----7--------------7----

3. After playing that about three times go into Main Verse and then play

G-----------------------------------------------
D-----------------------------------------------
A-----------------------------------------7----5
E--5---2---5----2---5-----2---5----2----------

Repeating until the music stops and Plant starts singing. 
You may want to throw in a double hit on the second fret for a cool fret that John Paul Jones does live which I think is kinda funky but its up to you! 
The solo is the same is number three. 
This is it, it is a pretty hard piece but with practice you should get the hang of it. 
Any questions or comments send e-mail my way to NCCowdew@aol.com
Enjoy!